|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||A-22: The Mechanical Properties of Al-Tb Nanocrystalline Marginal Metallic Glass Composite
||Can Okuyucu, Doguhan Sariturk, Tolga Han Ulucan, Mohammad Abboud, Amir Motallebzadeh, Sezer Özerinç, İlkay Kalay, Yunus Eren Kalay
|On-Site Speaker (Planned)
Partial devitrification of the Al-Tb marginal metallic glasses results in anomalous nucleation rate of nanocrystals. The resulting nanocrystalline metallic glass composites are regarded as promising engineering materials with robust properties such as higher strength and elasticity. In this study, the shear band propagation and corresponding micromechanical properties in nanocrystalline metallic glass composites were investigated in detail. The nanoindentation hardness values of the fully amorphous and the nanocrystalline metallic glass composite specimens were found as 2.8 GPa and 4.3 GPa, respectively. In contrast, the elastic modulus values were 68 GPa and 92 GPa. The increase in elastic modulus in partially crystalline specimens is associated with fcc-Al nanocrystals dividing the amorphous matrix and thus causing a branching of the shear bands. The mechanisms of shear band propagation in fully amorphous and partially crystalline marginal metallic glass will be discussed according to nanoindentation, micropillar compression, and transmission electron microscopy results.
||Characterization, Phase Transformations,